Brown spots, especially on the lips, can be alarming to some. In some instances it can indicate rare oral mucosal melanoma, however in this case it was a non cancerous labial melanotic macule. Non melanocytic lesionspreventing pitfalls in diagnosis Dental Update Skin cancer and some common mimics of skin cancer Dental Update Benign melanocytic naevi What Is an Acquired Melanocytic Nevus? Melanocytic nevus Wikipedia